wouldnt it make sense to get a mountain bike if you wanna do both? Like it can go both ways, where as a road bike wouldnt really be able to do mountain biking? I cant be bothered reading the threat but its kinda obvious?

I rode my full downhill bike everywhere for awhile, and they are really heavy. no problem at all just got an extra workout to go the same distance. most annoying thing was leaving a $4k bike outside a store or something, even with a lock, cause it will get stolen. so I guess a bit of a pain in the butt. a regular mountain bike is much easier to pedal than that, and I wouldn't feel too worried leaving it around. no problem at all.

but anyways @op that schwinn looks nice. like perfect entry level. I would get better pedals, and kill those reflectors and the kickstand asap. Get a new tube (and some spares and a patch kit and wd40/or chain oil if you dont have it), you can get these doublethick tubes which are sick cause they almost never puncture and you can ride them at lower pressures (added bonus if u care about that sort of thing).

If you ever want to upgrade the bike I would consider higher quality front suspension possibly with more travel. Lock-on grips (always good, and almost a must if you do a lot of tricks/hard stuff). A nice seat and bash guard is optional (most replace the third sprocket on the front, so less gears.. but the big sprocket isn't super useful anyway. it stops your pants getting caught + more clearance/guards remaining 2 sprockets from rocks). Hydraulic disc brakes are also really nice if you want to spend money, but idk if its worth it for that bike. I really enjoy them though, great stopping power. Mechanical disc brakes like the front of your bike (appears to) have are outclassed in every way by hydraulic disc brakes except price. Mechanical = pleb disc brakes. V-type brakes (like the rear) while being the cheapest of the three, at least have some redeeming qualities that I can get behind. They weigh less. anyways just some thoughts on what I would do, maybe you care for it maybe you don't :)

ignore the people who say to buy a hybrid, these people don't know what they're talking about. i've been a long time biker ranging from mountain to road biking, but mostly mountain biking. hybrids, from my experience, are just not worth it. they're essentially worse road bikes. sure, a hybrid won't break a wheel when you hit a pothole, but it's sure as hell not gonna last on a mountain bike trail (unless your "mountain bike trail" is just a dirt trail).

tangent for others considering a mountain bike: a mountain bike is a better investment. you can ride them almost everywhere, and road biking is generally boring as fuck anyway. mountain bikes let you explore more and have more fun. i was iffy about it at first, but now i love finding new trails around me and getting a good, fun exercise in with friends and such.

back on topic: that schwinn looks nice expect i agree with wonderland, get better pedals. those look like some low-qual plastic ones. i highly suggest clipped shoes for mountain biking, too. since you go over a lot of bumps, rocks, and such you'll be thankful for clips. not to mention there's nothing worse than slipping off your pedals going up a steep incline.

your need to pump the tire after every run means there's a hole or something in the tube. if you're tight on money, a tube with a single hole is reparable from my experience, but something that's been pinched (two holes) is a goner. remember to keep a mobile pump on your bike as well as well as a lever and a spare tube. you get stranded without those then it's a long walk back carrying a bike.

I would disagree with clips for a beginner/casual rider. Flats are almost as grippy these days. I ride 510s with flats and barely ever lose grip

???? You're saying that a pinch flat is unfixable???? Just use 2 patches.

this is a good idea. I never did tho (cause young & dumb) and thats some shit cross county riders do. I don't even have a water bottle holder cause it rattles around too much. with heavy duty tubes its so rare to get a puncture. but yeah it does happen. one time I got a flat in the middle of nowhere, had to catwalk my bike for like a couple miles to reach a gas station (better than walking at least). I vividly remember being stuck outside this gas station forever in the blazing sun using some heroin addicts spoon to take off my tire (which is extremely difficult with certain types of downhill tires cause the sidewall is super stiff), and my friend climbed in the icebox and was chilling. luckily we had a spare tube cause we used them for chain protectors ;) and it all worked out. good times I guess

A-plus solution: get a CamelBak or "hydration pack"
A good list of things to take with you is:
Pump
Spare tube
Repair kit
First aid kit( bandage and drugs)
Water
A spare layer( like a thermal long sleeve top)
Raincoat - weather dependant
Multi tool
Snacks -like musli bars and pineapple lumps

Helmet
Gloves
Optional shin guards which I dont use cause I enjoy pain

You need a hybrid bike, actually. Before choosing any hybrid bikes for your purpose, you can take a look at a buying guide on how to choose the best hybrid bike for your purpose.

If not sure, which one to read, you can check out this blog for more bike related information.

Best regards